apt-get: Package is in a very bad inconsistent state problem

After I dist-upgrade the Kubuntu 14.04 to 16.04, I ran the following command to update the system state.

sudo apt-get update; sudo apt-get upgrade; sudo apt-get autoremove;

Then, I got the following error.

dpkg: error processing gcc-doc (--remove):
Package is in a very bad inconsistent state - you should
reinstall it before attempting a removal.
Errors were encountered while processing:
gcc-doc
E: Sub-process /usr/bin/dpkg returned an error code (1)

All the following attempt didn't work

sudo dpkg --remove --force-remove-reinstreq gcc-doc
sudo dpkg --configure -a
sudo apt-get clean
sudo apt-get autoclean

At the end, I did a brute force way.

Find gcc-doc related files in /var/lib/dpkg/info and remove them

find /var/lib/dpkg/info/ -name *gcc-doc* -print | xargs rm

Then,

sudo apt-get update; sudo apt-get upgrade;
sudo apt-get install gcc-doc

This worked, but it is now by apt-get/dpkg and has some risk. Please use this with your own risk if you could not find any other solution.

Comments

Why parallelogram area is |ad-bc|?

Here is my question. The area of parallelogram is the difference of these two rectangles (red rectangle - blue rectangle). This is not intuitive for me. If you also think it is not so intuitive, you might interested in my slides. I try to explain this for hight school students. Slides: A bit intuitive (for me) explanation of area of parallelogram (to my site, external link) .

Geometric Multiplicity: eignvectors (2)

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Gauss's quote for positive, negative, and imaginary number

Recently I watched the following great videos about imaginary numbers by Welch Labs. https://youtu.be/T647CGsuOVU?list=PLiaHhY2iBX9g6KIvZ_703G3KJXapKkNaF I like this article about naming of math by Kalid Azad. https://betterexplained.com/articles/learning-tip-idea-name/ Both articles mentioned about Gauss, who suggested to use other names of positive, negative, and imaginary numbers. Gauss wrote these names are wrong and that is one of the reason people didn't get why negative times negative is positive, or, pure positive imaginary times pure positive imaginary is negative real number. I made a few videos about explaining why -1 * -1 = +1, too. Explanation: why -1 * -1 = +1 by pattern https://youtu.be/uD7JRdAzKP8 Explanation: why -1 * -1 = +1 by climbing a mountain https://youtu.be/uD7JRdAzKP8 But actually Gauss's insight is much powerful. The original is in the Gauß, Werke, Bd. 2, S. 178 . Hätte man +1, -1, √-1) nicht positiv, negative, imaginäre (oder gar um...

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